It has some other features that all tablets miss out - REMOVABLE battery and FM radio .
Having a spare battery would come in handy for long distance flights or your away from any power sockets while camping or other out door activity.

The galaxy player 5 had it so it's safe to assume that the 5.8 does too.

That's not a pic of the SGP 5; it's the SGP 4. The SGP 5 does not have a removable battery.